Newb Question I know...

[S|lv|4]

Hey I have been searching all of last night and this morning and I cant seem to find a reliable set of data. I'm sure this has been asked over and over and over again but I am hoping someone can help out and answer them without a ton of flames.


I know that the stock s13 sr20det is on 7psi from the factory, and that the stock bottom end can handle around 20psi pretty easily and I have been reading that the stock t25 can handle up to around 13-15 psi before its outside its efficiency range.

But what I cannot find through my searching is what a safe modified amount of boost the stock (62) ECU's tune will be able to handle as well as what the stock injectors can handle without being into anything dangerous.


I'm just trying to squeeze a bit more power out of the stock setup until I am able to upgrade and I have been seeing alot of people saying that they are running 10-11psi on stock setups with no problem. I am not looking to get more than around 10-11psi but I want to make sure that I will not be blowing this thing up by doing so.

I am running a stock s13 redtop in my S14 with minimal bolt ons - intake, FMIC, exhaust manifold, 3 inch turbo back exhaust and wont be doing any modifications until I can get a wideband hooked up along with a boost gauge but I do not want to go into this blind.

Thoughts anyone?

[angrypenguin182]

I will answr what I can, don't take this word for word. The t25 will be past efficiency past 12psi ans I wouldn't push it past 10 without a tune. Not sure at all how much boost the ecu tune can handle. I wouldn't raise boost until you have at least the wideband. This topic has been covered, just search a little more its all there

[S|lv|4]

Cool, I hope I can get some more specific numbers for max psi because I cant find crap in search

[Shadow Drifter]

Drop an s15 turbo in it run it at no more then 12PSi even with the stock ecu and maf you will be fine I run this setup on my DD for the last 2 years with no problems

[Shadow Drifter]

Drop an s15 turbo in it run it at no more then 12PSi even with the stock ecu and maf you will be fine I run this setup on my DD for the last 2 years with no problems

[jdmxpress]

i run 10psi on mine and have not had any problems what so ever.

[compactfean]

Ive ran 1bar on a stock Turbo in the past with stock everything and an eprom tune and fmic.